<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
点击切换语言：
<a href="?lang=zh_CN">简体中文</a> &nbsp;&nbsp;
<a href="?lang=en_US">English(US)</a><br>
<div  style="height: 300px;width: 300px;background-color: darkcyan;font-size: 20px;color: #ffffff;">
    <span th:text="#{welcome}"></span>
</div>
</body>
</html>